Functional troubleshooting

Functional Troubleshooting

This section covers problems with the numbers rather than with the hardware itself.

Some functions missing.	Necessary interface missing. See Configuration. Function is disabled. See Disabling Tags.
Boatspeed not zero when it should be.	(Several Knots) Usually caused by the AC power to the battery charger. Try disconnecting the boat from shore power. (Small number or Intermittent) Caused by current or vibration transmitted through the hull to the paddle. NOTE: because they have no bearings to unstick, ultrasonic boatspeed sensors will typically show a few tenths of a knot at the dock.
Apparent Wind Speed not zero when it should be.	(Several Knots) Usually caused by the AC power to the battery charger. Try disconnecting the boat from shore power. Caused by mast vibration. Apparent wind speed modified by roll rate. See discussion in Section 4, Option 8.
Bad Wind Direction.	No True Wind Speed. Since true wind is a vector solution, when true wind speed is zero, True Wind Direction has no meaning and is set equal to Heading. Check True Wind Angle, True Wind Speed and Heading for proper values.
Bad True Wind Angle.	Zero True Wind Angle. Since True Wind is a vector solution, when True Wind Speed is zero, True Wind Angle has no meaning, and is set to 0. Check Apparent Wind Angle, Apparent Wind Speed and Boatspeed for proper values.
Bad Apparent Wind Angle.	Apparent wind angle modified by roll rate. See Setting Mast Height. Bad masthead sensoror or connection between masthead and interface. Check for TEST Errors 33, 34 and 35. Loose masthead bracket.
Bad Heading.	No power to heading sensor. Most heading sensors require a separate power supply. Check that the heading sensor is receiving power. Some magnetic item has gotten near the sensor. Sensor needs compensation.
LOG or TIME resets on power up or engine start.	Dead backup battery. Return CPU for service when convenient.
Wierd	See Display Troubleshooting.

More detail:
Technical papers on Troubleshooting